B.5 Multislot capabilities when EFTA is used
3GPP45.002GSM/EDGE Multiplexing and multiple access on the radio pathRelease 17TS
For mobile stations supporting Enhanced Flexible Timeslot Assignment, EFTA, the multislot capability parameters applicable to EFTA operation in a single carrier configuration are dependent on the signalled (DTM) EGPRS high multislot class (see subclause B.1) and on the Alternative EFTA multislot class (see Table B.3) indicated by the mobile station in the MS Radio Access Capability IE (see 3GPP TS 24.008).
The multislot capability parameters Rx and Tx shall be derived as follows:
– If no Alternative EFTA multislot class is given then Rx and Tx of the signalled multislot class shall apply.
– If an Alternative EFTA multislot class is given then Tx of the signalled multislot class shall apply whereas Rx of the Alternative EFTA multislot class shall apply.
The multislot capability parameters Sum, Tta, Ttb, Tra and Trb shall be derived as follows:
– If an Alternative EFTA multislot class is given and the mobile station is assigned a multislot configuration comprising a number of downlink timeslots higher than the Rx value corresponding to the signalled multislot class and the mobile station is not transmitting in a given radio block period, then Trb and Tra as given in Table B.3 shall apply for the considered radio block period. Sum, Tta and Ttb are not applicable during the considered radio block period.
– In all other cases, Sum, Tta, Ttb, Tra and Trb of the signalled multislot class shall apply.
Only mobile stations with (DTM) EGPRS high multislot classes 30-45 can support EFTA.
Table B.3
|
Alternative EFTA multislot class |
Rx |
Tra |
Trb (NOTE 2) |
|
Alternative EFTA multislot class 1 |
6 |
1 |
c) |
|
Alternative EFTA multislot class 2 |
7 |
1 |
c) |
|
Alternative EFTA multislot class 3 |
8 |
1 (NOTE 1) |
d) |
|
NOTE 1: Tra not applicable for multislot configurations with d=8 timeslots. NOTE 2: c) and d) are as defined in subclause B.1. |
|||
Whether normal measurements (see 3GPP TS 45.008) and/or normal BSIC decoding (see 3GPP TS 45.008) are possible will be dependent on the allocation or on the use of a second receiver for this purpose.
The multislot capability parameters applicable to EFTA operation in a downlink dual carrier configuration are in addition dependent on the EFTA Multislot Capability Reduction for Downlink Dual Carrier field (see subclause B.4).